Thermoplastic polyurethanes (TPU) (based on ether and ester polyols) were blended with nonpolar material of PP. Nanoclay was used to reduce the surface energy of the TPU hard segments and makes them more compatible with the non-polar PP. More compatible blends have been obtained by using MA-g-PP as the compatibiliser. Blends were produced by melt mixing using a twin crew extruder. Compared to the ether-TPU based blend nano- composites, the ester-TPU blends show better compatibility as con- firmed by DMA, Tensile strength, XRD, SEM, and AFM analysis.
Dr. Kannan M., Bhagawan, S. S., Joseph, K., and Thomas, S., “Mechanical properties and morphology of nanoclay-filled different TPU/PP blends”, Polymer-Plastics Technology and Engineering, vol. 48, pp. 871–876, 2009.